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<h1 class="topictitle1">Function Overview</h1>
<div><ul><li>Full backup: backs up all data of resources at the current time point. </li><li>Log backup: backs up TiDB cluster logs.</li><li>Copy verification: verifies the integrity of a copy after the backup is complete or before the copy is used for restoration. </li><li>Source deduplication: reduces the amount of data to be transmitted, but occupies more client resources. </li><li>Backup link encryption: encrypts transmitted data during data backup to ensure data security. </li><li>Transmission and storage encryption: adopts the AES256 encryption algorithm to encrypt backup data.</li></ul>
<div class="section"><h4 class="sectiontitle">Replication</h4><ul id="EN-US_TOPIC_0000001832454472__en-us_topic_0000001862053249_ul1627759153116"><li id="EN-US_TOPIC_0000001832454472__en-us_topic_0000001862053249_li816915753113">Backup copy replication: replicates backup copies from the source end to the target end. If a disaster occurs in the local data center, the replication copies can be used to restore service data. </li><li id="EN-US_TOPIC_0000001832454472__en-us_topic_0000001862053249_li1683335383118">Replication link encryption: After an IPsec policy is created for the replication network logical ports on the storage devices at both ends of the replication link, data is encrypted during remote replication to ensure security. </li><li id="EN-US_TOPIC_0000001832454472__en-us_topic_0000001862053249_li1669412580315">Reverse replication: replicates replication copies from the target end to the source end. </li><li id="EN-US_TOPIC_0000001832454472__en-us_topic_0000001862053249_li5293151193212">Cascaded replication: replicates replication copies from the target end to the other end. </li></ul>
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<div class="section"><h4 class="sectiontitle">Archiving</h4><ul id="EN-US_TOPIC_0000001832454472__en-us_topic_0000001862053249_ul291217773211"><li id="EN-US_TOPIC_0000001832454472__en-us_topic_0000001862053249_li123915583213">Archive of backup/replication copies to object storage: archives backup/replication copies that need to be retained for a long time to object storage. </li><li id="EN-US_TOPIC_0000001832454472__en-us_topic_0000001862053249_li88191920143218">Archive of backup/replication copies to tape libraries: archives backup/replication copies that need to be retained for a long time to tape libraries. </li></ul>
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<div class="section"><h4 class="sectiontitle">Restoration</h4><ul id="EN-US_TOPIC_0000001832454472__en-us_topic_0000001862053249_ul691518483322"><li id="EN-US_TOPIC_0000001832454472__en-us_topic_0000001862053249_li18600174653218">Copy-based restoration to the original or a new location: supports data restoration using backup copies, reverse replication copies, cascaded replication copies (data cannot be restored to the original location), archive copies (<span id="EN-US_TOPIC_0000001832454472__en-us_topic_0000001862053249_ph36996813016">data cannot be restored to the original location using the archive copies generated by replication copes and cascaded replication copies</span>), and replication copies (data cannot be restored to the original location). </li></ul>
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